US 7,612,509 B2Granted

Motor controller

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorsTakahiro Urakabe, Tsunenobu Yamamoto, Yoshihito Asao

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Abstract

A motor controller is provided which can be reduced in the number of the wirings and power semiconductor devices required while maintaining the function equivalent to or higher than that of the motor controller adopting the existing winding changeover scheme, thereby realizing cost and size reduction and life increase. The motor is made in a structure having motor windings opened at both ends. The one end terminals of phase windings are respectively connected to the output terminals of a first inverter circuit while the other end terminals are respectively connected to the output terminals of a second inverter circuit. During power generation, any one of the inverter circuits is driven on all the phases by means of a same control pulse.

Claims10

Dependent claims

A motor controller comprising:

a motor having a plurality of stator windings opened at both ends;
an inverter circuit configured with a plurality of phases of switch blocks whose output terminals are connected to one ends of the stator windings;
a switch unit circuit configured with a plurality of phases of switch blocks whose output terminals are connected to the other ends of the stator windings;
a control circuit for controlling respective switch elements of the inverter circuit and the switch unit circuit;
and
an energy storage source connected to respective direct-current voltage input terminals of the inverter circuit and the switch unit circuit;
wherein at least one of the switch blocks of the switch unit circuit comprises a first element and a second element connected in series,
wherein the first element comprises a first switch element and the second element comprises a first diode without any switching elements, and
wherein at least one of the switch blocks of the inverter circuit comprises a second switch element and a third switch element connected in series.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/782,956Filed 8 Aug 2007 · continuation
Priority: JP P2004-33894524 Nov 2004
Published: US 2007/0290647 A120 Dec 2007
Granted: 3 Nov 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H02P 27/06
Using variable-frequency supply voltage, e.g. inverter or converter supply voltage: using DC to AC converters or inverters
H02P 25/20
With arrangements for switching the windings, e.g. with mechanical switches or relays: for pole-changing
H02P
Control or regulation of electric motors, electric generators or dynamo-electric converters

Family

Application11/281,410Parent of this continuation · filed 18 Nov 2005
US 2007/0290647 A1Pre-grant publication · published 20 Dec 2007
US 7,294,984 B2Parent of this continuation
US 2006/0108957 A1Published application
US 7,612,509 B2This patent

From the US filing history. Foreign family members aren’t listed.

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